Improvement in the mode of heating the supply-water and carrying off the escape steam



NlPETEHS, PHOTO LITHGGRAFHER. WASHINGTON, D. CA

UNITED STATES PATENT OFFICE.

vNATHAN COPE, OF HANOVER, OHIO.i

IMPROVEMENT IN THE MODE 0F HEATING THE SUPPLY-WATER AND CARRYING OFF THE ESCAPE STEAM IN HIGH-PRESSURE STEAM-ENGINES.

Specification forming part of Letters Patent No. 2,968, dated February 20, 1843.

To all whom it may concern:

Be it known that LNATHAN COPE, of Hanover, in the county of Columbiana and State of Ohio, have invented a new anduseful Im-' provement in the Mode of Constructing High- Prcssure Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description ot' the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a perspective View. Fig. 2 isa side View of the boiler and the escape-pipe, whichis placed within it, and also of the supply-pi pe and the manner of connecting it. Fig. 3 shows the manner in which the supplypipe is supported in the inside of the escapepipe. Fig. 4 shows the construction of the damper.

A, Fig. l, represents the escape-pipe coinmencing at each end of the cylinder C by a side pipe B, which unites in and is attached to a single pipe at V, and thence enters the boiler D at E about five inches from the bottom and extends lengthwise through Vthe boiler D and projecting about three inches, as represented at A in Fig. 2, where the escape steam enters t-he raretied air in the stack or chimney through a suitable communication. The escape-pipe should be about eight inches in diameter for an engine of twentytive horse-power, (the dimensions here given should be varied in proportion to the dilerence in the size of different engines and the density of the steam,) and is made in sections with iianges and bolted together in the ordinary manner. Near the end connected with B it is provided with a branch or piece designed to receive the supplying-pipe H. As represented at I in Fig. l, it is placed about one inch lower at A in Fig. 2 than itis at E in Fig. l for the purpose of enabling the condensed steam to pass out of said pipe at A, Fig. 2.

The boiler D is supplied with water by means of the force-pump F with the stopvalve placed at G. The Water from thence enters the supply-pipe H, which is made in sections of such lengths as are best adapted to the various situations in which it may be placed, and is fastened together by male and female screws, as represented at L in Fig. 2. The supply-pipe enters the escape-pipe A at I and continues in the inside of said escapepipe, where it is held by means of supports, as represented at K K K in Figs. 2and 3, to its lower or farther end and then extending through the end of the escape-pipe, where by a curve it returns and communicates with a hole in the head of the boiler D near its lower side, as represented at I,Fig. 2, at which point the water is discharged into the boiler D after having passed through the length of the supply-pipe, which pipe is firmly held at each end by screw-bolts passing through the iianges in the ordinary manner.

The advantage gained by the operation of the above invention consists in the escape steam being discharged into the stack orchimney, where the air is highly rarelied by the heat of the furnace, thereby proportionally diminishing the resistance occasioned by being otherwise discharged, as is customary, into the atmosphere, where the resistance it meets with is equal to fifteen pounds upon each square inch ofl the area of the pistonhead, and also by heating the supply-water before it is discharged into the boiler by passing the supply-pipe through the said escapepipe, Where it is heated to a degree of heat but little inferior to the temperature of the escape steam itself, thereby causing a corresponding saving of caloric or fuel.

What I claim as my invention, and desire to secure by Letters Patent, is-

An improvement in the mode of constructing high pressure steam engines (applicable to all the various constructions now in use, the original invention of which engines is herebyl expressly disclaimed) by introducing the escape pipe or pipes into and through the boiler or boilers, so that the escape steam may be discharged from thence into the stack or chimney or some suitable place that will communicate with the same, and also passing the supply pipe or pipes through which the water is conveyed to supply the boiler or boilers into and lengthwise through the said escape pipe or pipes, where the supply-water will' be heated by the escape steam previous to its passing into thc boiler or boilers, as herein described.

NATHAN COPE.

TVitnesses:

HUGH JORDAN, JESSE VAN MATER. 

